Camera optical lens

ABSTRACT

The present disclosure discloses a camera optical lens. The camera optical lens includes, in an order from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The camera optical lens further satisfies following conditions: −10.00f1/f3−1.00; 3.50R5/R620.00; where f3 denotes a focal length of the third lens; f1 denotes a focal length of the first lens; R5 denotes a curvature radius of an object side surface of the third lens; and R6 denotes a curvature radius of an image side surface of the third lens. The camera optical lens can achieve a high performance while obtaining a low TTL.

FIELD OF THE PRESENT INVENTION

The present invention relates to the field of optical lens, and more particularly, to a camera optical lens suitable for handheld terminal devices, such as smart phones and digital cameras, and imaging devices, such as monitors or PC lenses.

DESCRIPTION OF RELATED ART

With the emergence of smart phones in recent years, the demand for miniature camera lens is increasing day by day, but in general the photosensitive devices of camera lens are nothing more than Charge Coupled Device (CCD) or Complementary Metal-Oxide Semiconductor Sensor (CMOS sensor), and as the progress of the semiconductor manufacturing technology makes the pixel size of the photosensitive devices become smaller, plus the current development trend of electronic products towards better functions and thinner and smaller dimensions, miniature camera lenses with good imaging quality therefore have become a mainstream in the market. In order to obtain better imaging quality, the lens that is traditionally equipped in mobile phone cameras adopts a three-piece or four-piece lens structure. Also, with the development of technology and the increase of the diverse demands of users, and as the pixel area of photosensitive devices is becoming smaller and smaller and the requirement of the system on the imaging quality is improving constantly, the five-piece, six-piece and seven-piece lens structures gradually appear in lens designs. There is an urgent need for ultra-thin, wide-angle camera lenses with good optical characteristics and fully corrected chromatic aberration.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of a structure of a camera optical lens in accordance with Embodiment 1 of the present invention;

FIG. 2 is a schematic diagram of a longitudinal aberration of the camera optical lens shown in FIG. 1;

FIG. 3 is a schematic diagram of a lateral color of the camera optical lens shown in FIG. 1;

FIG. 4 is a schematic diagram of a field curvature and a distortion of the camera optical lens shown in FIG. 1;

FIG. 5 is a schematic diagram of a structure of a camera optical lens in accordance with Embodiment 2 of the present invention;

FIG. 6 is a schematic diagram of a longitudinal aberration of the camera optical lens shown in FIG. 5;

FIG. 7 is a schematic diagram of a lateral color of the camera optical lens shown in FIG. 5;

FIG. 8 is a schematic diagram of a field curvature and a distortion of the camera optical lens shown in FIG. 5;

FIG. 9 is a schematic diagram of a structure of a camera optical lens in accordance with Embodiment 3 of the present invention;

FIG. 10 is a schematic diagram of a longitudinal aberration of the camera optical lens shown in FIG. 9;

FIG. 11 is a schematic diagram of a lateral color of the camera optical lens shown in FIG. 9; and

FIG. 12 is a schematic diagram of a field curvature and a distortion of the camera optical lens shown in FIG. 9.

DETAILED DESCRIPTION OF THE EXEMPLARY EMBODIMENTS

In order to make the objects, technical solutions, and advantages of the present invention more apparent, the embodiments of the present invention will be described in detail below. However, it will be apparent to the one skilled in the art that, in the various embodiments of the present invention, a number of technical details are presented in order to provide the reader with a better understanding of the invention. However, the technical solutions claimed in the present invention can be implemented without these technical details and various changes and modifications based on the following embodiments.

Embodiment 1

As referring to the accompanying drawings, the present invention provides a camera optical lens 10. FIG. 1 shows the camera optical lens 10 according to Embodiment 1 of the present invention, the camera optical lens 10 comprises six lenses. Specifically, from an object side to an image side, the camera optical lens 10 comprises in sequence: an aperture S1, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a sixth lens L6. Optical elements like optical filter GF can be arranged between the sixth lens L6 and an image surface Si.

The first lens L1 is made of plastic material, the second lens L2 is made of plastic material, the third lens L3 is made of plastic material, the fourth lens L4 is made of plastic material, the fifth lens L5 is made of plastic material, and the sixth lens L6 is made of plastic material.

Here, a focal length of the first lens L1 is defined as f1, and a focal length of the third lens L3 is defined as f3. The camera optical lens 10 further satisfies a following condition: −10.00

f1/f3

−1.00, which specifies a ratio of the focal length f1 of the first lens L1 and the focal length f3 of the third lens L3. This can effectively reduce the sensitivity of the camera optical lens, and further improve an imaging quality. Preferably, the following condition shall be satisfied, −9.34

f1/f3

−1.03.

A curvature radius of an object side surface of the third lens L3 is defined as R5, and a curvature radius of an image side surface of the third lens L3 is defined as R6. The camera optical lens 10 further satisfies the following condition: 3.50

R5/R6

20.00, which defines a shape of the third lens L3. When the value is within the range, as the camera optical lens develops toward ultra-thin and wide-angle, it is beneficial to correct the problem of an axial chromatic aberration. Preferably, the following condition shall be satisfied, 3.88

R5/R6

19.92.

A total optical length from an object side surface of the first lens L1 to the image surface of the camera optical lens 10 along an optical axis is defined as TTL.

When the focal length of the third lens, the focal length of the first lens, the curvature radius of the object side surface of the third lens, the curvature radius of the image side surface of the third lens satisfy the above conditions, the camera optical lens 10 has the advantage of high performance and meets the design requirement on low TTL.

In the embodiment, the object side surface of the first lens L1 is convex in a paraxial region, and an image side surface of the first lens L1 is concave in the paraxial region, and the first lens L1 has a positive refractive power.

A focal length of the camera optical lens 10 is defined as f, and the focal length of the first lens L1 is defined as f1. The camera optical lens 10 further satisfies the following condition: 0.46

f1/f

2.55, which defines the ratio of the positive refractive power of the first lens L1 and the focal length f of the camera optical lens 10. When the value is within the range, the first lens has a suitable positive refractive power that is beneficial for reducing an aberration of the system, and is beneficial for developing ultra-thin and wide-angle lenses. Preferably, the following condition shall be satisfied, 0.74

f1/f

2.04.

A curvature radius of the object side surface of the first lens L1 is R1, and a curvature radius of an image side surface of the first lens L1 is R2. The camera optical lens 10 further satisfies the following condition: −5.68

(R1+R2)/(R1−R2)

−1.25. This condition reasonably controls a shape of the first lens, so that the first lens can effectively correct a spherical aberration of the system. Preferably, the following condition shall be satisfied, −3.55

(R1+R2)/(R1−R2)

−1.57.

An on-axis thickness of the first lens L1 is defined as d1. The camera optical lens 10 further satisfies the following condition: 0.04

d1/TTL

0.22, which is beneficial for developing ultra-thin lenses. Preferably, the following condition shall be satisfied, 0.07

d1/TTL

0.18.

In the embodiment, an object side surface of the second lens L2 is convex in the paraxial region, and an image side surface of the second lens L2 is concave in the paraxial region. The second lens L2 has a negative refractive power.

The focal length of the camera optical lens 10 is defined as f, and a focal length of the second lens L2 is defined as f2. The camera optical lens 10 further satisfies the following condition: −133.78

f2/f

−2.59. It benefits for correcting the aberration of the optical system by controlling the negative refractive power of the second lens L2 being within a reasonable scope. Preferably, the following condition shall be satisfied, −83.62

f2/f

−3.24.

A curvature radius of the object side surface of the second lens L2 is defined as R3, and a curvature radius of the image side surface of the second lens L2 is defined as R4. The camera optical lens 10 further satisfies the following condition: 2.37

(R3+R4)/(R3−R4)

35.46, which defines a shape of the second lens L2. When the value is within the range, as the camera optical lens develops toward ultra-thin and wide-angle, it is beneficial to correct the problem of the axial chromatic aberration. Preferably, the following condition shall be satisfied, 3.79

(R3+R4)/(R3−R4)

28.37.

An on-axis thickness of the second lens L2 is defined as d3. The camera optical lens 10 further satisfies the following condition: 0.02

d3/TTL

0.14, which benefits for developing ultra-thin lenses. Preferably, the following condition shall be satisfied, 0.04

d3/TTL

0.11.

In the embodiment, the object side surface of the third lens L3 is convex in the paraxial region, the image side surface of the third lens L3 is concave in the paraxial region, and the third lens L3 has a negative refractive power.

The focal length of the camera optical lens 10 is defined as f, and the focal length of the third lens L3 is defined as f3. The camera optical lens 10 further satisfies the following condition: −1.78

f3/f

−0.12. The appropriate distribution of the refractive power leads to a better imaging quality and a lower sensitivity. Preferably, the following condition shall be satisfied, −1.11

f3/f

−0.15.

A curvature radius of the object side surface of the third lens L3 is defined as R5, and a curvature radius of the image side surface of the third lens L3 is defined as R6. The camera optical lens 10 further satisfies the following condition: 0.55

(R5+R6)/(R5−R6)

2.42. This can effectively control the shape of the third lens L3, thereby facilitating shaping of the third lens L3 and avoiding bad shaping and generation of stress due to the overly large surface curvature of the third lens L3. Preferably, the following condition shall be satisfied, 0.88

(R5+R6)/(R5−R6)

1.94.

An on-axis thickness of the third lens L3 is defined as d5. The camera optical lens 10 further satisfies the following condition: 0.03

d5/TTL

0.10, which benefits for developing ultra-thin lenses. Preferably, the following condition shall be satisfied, 0.04

d5/TTL

0.08.

In the embodiment, an object side surface of the fourth lens L4 is convex in the paraxial region, an image side surface of the fourth lens L4 is concave in the paraxial region, and the fourth lens L4 has a positive refractive power.

The focal length of the camera optical lens 10 is defined as f, and a focal length of the fourth lens L4 is f4. The camera optical lens 10 further satisfies the following condition: 0.09

f4/f

1.90. The appropriate distribution of the refractive power leads to a better imaging quality and a lower sensitivity. Preferably, the following condition shall be satisfied, 0.15

f4/f

1.52.

A curvature radius of the object side surface of the fourth lens L4 is defined as R7, and a curvature radius of the image side surface of the fourth lens L4 is defined as R8. The camera optical lens 10 further satisfies the following condition: −7.54

(R7+R8)/(R7−R8)

−1.74, which defines a shape of the fourth lens L4. When the value is within the range, as the development of ultra-thin and wide-angle lens, it benefits for solving the problems, such as correcting an off-axis aberration. Preferably, the following condition shall be satisfied, −4.71

(R7+R8)/(R7−R8)

−2.18.

An on-axis thickness of the fourth lens L4 is defined as d7. The camera optical lens 10 further satisfies the following condition: 0.03

d7/TTL

0.08, which benefits for developing ultra-thin lenses. Preferably, the following condition shall be satisfied, 0.04

d7/TTL

0.06.

In the embodiment, an object side surface of the fifth lens L5 is convex in the paraxial region, the image side surface of the fifth lens L5 is convex in the paraxial region, and the fifth lens L5 has a positive refractive power.

The focal length of the camera optical lens 10 is defined as f, and a focal length of the fifth lens L5 is defined as f5. The camera optical lens 10 further satisfies the following condition: −0.28

f5/f

1.06, which can effectively make a light angle of the camera lens be gentle, and the sensitivity of the tolerance can be reduced. Preferably, the following condition shall be satisfied, 0.45

f5/f

0.84.

A curvature radius of the object side surface of the fifth lens L5 is defined as R9, and a curvature radius of the image side surface of the fifth lens L5 is defined as R10. The camera optical lens 10 further satisfies the following condition: 0.33

(R9+R10)/(R9−R10)

1.37, which defines a shape of the fifth lens L5. When the value is within the range, as the development of ultra-thin and wide-angle lens, it benefits for solving the problems, such as correcting the off-axis aberration. Preferably, the following condition shall be satisfied, 0.53

(R9+R10)/(R9−R10)

1.09.

An on-axis thickness of the fifth lens L5 is defined as d9. The camera optical lens 10 further satisfies the following condition: 0.06

d9/TTL

0.25, which benefits for developing ultra-thin lenses. Preferably, the following condition shall be satisfied, 0.10

d9/TTL

0.20.

In the embodiment, an object side surface of the sixth lens L6 is concave in the paraxial region, the image side surface of the sixth lens L6 is concave in the paraxial region, the sixth lens L6 has a negative refractive power.

The focal length of the camera optical lens 10 is defined as f, and a focal length of the sixth lens L6 is f6. The camera optical lens 10 further satisfies the following condition: −1.63

f6/f

−0.40. The appropriate distribution of the refractive power leads to a better imaging quality and a lower sensitivity. Preferably, the following condition shall be satisfied, −1.02

f6/f

−0.51.

A curvature radius of the object side surface of the sixth lens L6 is defined as R11, and a curvature radius of the image side surface of the sixth lens L6 is defined as R12. The camera optical lens 10 further satisfies the following condition: 0.26

(R11+R12)/(R11−R12)

1.16, which defines a shape of the sixth lens L6. When the value is within the range, as the development of ultra-thin and wide-angle lens, it benefits for solving the problems, such as correcting the off-axis aberration. Preferably, the following condition shall be satisfied, 0.42

(R11+R12)/(R11−R12)

0.93.

An on-axis thickness of the sixth lens L6 is defined as d11. The camera optical lens 10 further satisfies the following condition: 0.03

d11/TTL

0.10, which benefits for developing ultra-thin lenses. Preferably, the following condition shall be satisfied, 0.05

d11/TTL

0.08.

In this embodiment, the focal length of the camera optical lens 10 is defined as f, and a combined focal length of the first lens L1 and the second lens L2 is defined as f12. The camera optical lens 10 further satisfies the following condition: 0.56

f12/f

2.63. With such configuration, the abberation and distortion of the camera optical lens can be eliminated while suppressing a back focal length of the camera optical lens, thereby maintaining miniaturization of the camera lens system. Preferably, the following condition shall be satisfied, 0.90

f12/f

2.11.

In this embodiment, the total optical length TTL of the camera optical lens 10 is less than or equal to 6.60 mm, it benefits for developing ultra-thin lenses. Preferably, the total optical length TTL of the camera optical lens 10 is less than or equal to 6.30 mm.

In this embodiment, an F number of the camera optical lens 10 is less than or equal to 2.32. The camera optical lens 10 has a large and a better imaging performance. Preferably, the F number of the camera optical lens 10 is less than or equal to 2.27.

With such design, the total optical length TTL of the camera optical lens 10 can be made as short as possible, thus the miniaturization characteristics can be maintained.

In the following, examples will be used to describe the camera optical lens 10 of the present invention. The symbols recorded in each example will be described as follows. The focal length, on-axis distance, curvature radius, on-axis thickness, inflexion point position, and arrest point position are all in units of mm.

TTL: the total optical length from the object side surface of the first lens to the image surface of the camera optical lens along the optical axis, the unit of TTL is mm.

Preferably, inflexion points and/or arrest points can also be arranged on the object side surface and/or image side surface of the lens, so that the demand for high quality imaging can be satisfied, the description below can be referred for specific implementable scheme.

The design information of the camera optical lens 10 in Embodiment 1 of the present invention is shown in the tables 1 and 2.

TABLE 1 R d nd vd S1 ∞ d0= −0.568 R1 1.830 d1= 0.849 nd1 1.5444 v1 55.82 R2 5.985 d2= 0.083 R3 6.526 d3= 0.265 nd2 1.6700 v2 19.39 R4 4.249 d4= 0.550 R5 50.133 d5= 0.366 nd3 1.6153 v3 25.94 R6 2.528 d6= 0.060 R7 2.061 d7= 0.300 nd4 1.6153 v4 25.94 R8 4.252 d8= 0.219 R9 17.296 d9= 0.954 nd5 1.5444 v5 55.82 R10 −2.046 d10= 0.648 R11 −6.837 d11= 0.392 nd6 1.5438 v6 56.03 R12 2.136 d12= 0.340 R13 ∞ d13= 0.210 ndg 1.5168 vg 64.17 R14 ∞ d14= 0.513

where, meanings of various symbols will be described as follows.

S1: aperture;

R: curvature radius of an optical surface, a central curvature radius for a lens;

R1: curvature radius of the object side surface of the first lens L1;

R2: curvature radius of the image side surface of the first lens L1;

R3: curvature radius of the object side surface of the second lens L2;

R4: curvature radius of the image side surface of the second lens L2;

R5: curvature radius of the object side surface of the third lens L3;

R6: curvature radius of the image side surface of the third lens L3;

R7: curvature radius of the object side surface of the fourth lens L4;

R8: curvature radius of the image side surface of the fourth lens L4;

R9: curvature radius of the object side surface of the fifth lens L5;

R10: curvature radius of the image side surface of the fifth lens L5;

R11: curvature radius of the object side surface of the sixth lens L6;

R12: curvature radius of the image side surface of the sixth lens L6;

R13: curvature radius of an object side surface of the optical filter GF;

R14: curvature radius of an image side surface of the optical filter GF;

d: on-axis thickness of a lens and an on-axis distance between lenses;

d0: on-axis distance from the aperture S1 to the object side surface of the first lens L1;

d1: on-axis thickness of the first lens L1;

d2: on-axis distance from the image side surface of the first lens L1 to the object side surface of the second lens L2;

d3: on-axis thickness of the second lens L2;

d4: on-axis distance from the image side surface of the second lens L2 to the object side surface of the third lens L3;

d5: on-axis thickness of the third lens L3;

d6: on-axis distance from the image side surface of the third lens L3 to the object side surface of the fourth lens L4;

d7: on-axis thickness of the fourth lens L4;

d8: on-axis distance from the image side surface of the fourth lens L4 to the object side surface of the fifth lens L5;

d9: on-axis thickness of the fifth lens L5;

d10: on-axis distance from the image side surface of the fifth lens L5 to the object side surface of the sixth lens L6;

d11: on-axis thickness of the sixth lens L6;

d12: on-axis distance from the image side surface of the sixth lens L6 to the object side surface of the optical filter GF;

d13: on-axis thickness of the optical filter GF;

d14: on-axis distance from the image side surface of the optical filter GF to the image surface;

nd: refractive index of d line;

nd1: refractive index of d line of the first lens L1;

nd2: refractive index of d line of the second lens L2;

nd3: refractive index of d line of the third lens L3;

nd4: refractive index of d line of the fourth lens L4;

nd5: refractive index of d line of the fifth lens L5;

nd6: refractive index of d line of the sixth lens L6;

ndg: refractive index of d line of the optical filter GF;

vd: abbe number;

v1: abbe number of the first lens L1;

v2: abbe number of the second lens L2;

v3: abbe number of the third lens L3;

v4: abbe number of the fourth lens L4;

v5: abbe number of the fifth lens L5;

v6: abbe number of the sixth lens L6;

vg: abbe number of the optical filter GF;

Table 2 shows the aspherical surface data of the camera optical lens 10 in Embodiment 1 of the present invention.

TABLE 2 Conic coefficient Aspheric Surface coefficients k A4 A6 A8 A10 R1 −2.5361E−01 1.1442E−03 2.8561E−02 −5.9410E−02 7.6260E−02 R2 −2.0945E+00 −7.8850E−02 7.2959E−02 −6.3722E−02 6.3909E−02 R3 1.2000E+01 −1.0959E−01 8.1004E−02 6.0573E−03 −3.4191E−02 R4 9.8761E+00 −5.2966E−02 2.0387E−02 1.4210E−01 −3.0856E−01 R5 −1.0000E+01 −1.1773E−01 1.6709E−01 −3.2245E−01 2.9045E−01 R6 −7.0341E+00 −5.9086E−01 1.3567E+00 −2.3451E+00 2.6282E+00 R7 −1.1225E+01 −5.8931E−01 1.0391E+00 −1.2914E+00 9.9891E−01 R8 −2.2128E+01 −2.6845E−01 2.7517E−01 −1.7611E−01 7.3571E−02 R9 1.0000E+01 −5.8935E−02 5.6076E−02 −2.2722E−02 −3.2061E−03 R10 −1.9632E+00 3.9555E−02 −1.9323E−02 1.6034E−02 −9.4091E−03 R11 2.0536E+00 −1.1508E−01 6.5467E−02 −3.2517E−02 1.1882E−02 R12 −1.2952E+01 −5.0722E−02 1.5174E−02 −3.3252E−03 2.2941E−04 Aspheric Surface coefficients Al2 A14 A16 A18 A20 R1 −5.4538E−02 2.0722E−02 −3.3627E−03 0.0000E+00 0.0000E+00 R2 −5.1475E−02 2.2564E−02 −4.0207E−03 0.0000E+00 0.0000E+00 R3 1.0801E−02 4.4222E−03 −1.8597E−03 0.0000E+00 0.0000E+00 R4 3.3053E−01 −1.8638E−01 4.5622E−02 0.0000E+00 0.0000E+00 R5 −1.0242E−01 −2.2528E−02 1.8527E−02 0.0000E+00 0.0000E+00 R6 −1.9591E+00 9.4346E−01 −2.6594E−01 3.3315E−02 0.0000E+00 R7 −4.5828E−01 1.1537E−01 −1.2529E−02 0.0000E+00 0.0000E+00 R8 −1.7036E−02 1.2619E−03 2.1187E−04 −3.3670E−05 0.0000E+00 R9 6.0822E−03 −2.2948E−03 4.2565E−04 −4.0515E−05 1.5907E−06 R10 3.5036E−03 −8.2048E−04 1.1653E−04 −9.1677E−06 3.0652E−07 R11 −2.6815E−03 3.6751E−04 −3.0030E−05 1.3497E−06 −2.5723E−08 R12 7.7607E−05 −2.3066E−05 2.6849E−06 −1.4905E−07 3.2393E−09

Where, K is a Conic coefficient, A4, A6, A8, A10, A12, A14, A16, A18, A20 are aspheric surface coefficients.

IH: Image height y=(x ² /R)/[1+{1−(k+1)(x ² /R ²)}^(1/2)]+A4x ⁴ +A6x ⁶ +A8x ⁸ +A10x ¹⁰ +A12x ¹² +A14x ¹⁴ +A16x ¹⁶ +A18x ¹⁸ +A20x ²⁰  (1)

For convenience, an aspheric surface of each lens surface uses the aspheric surfaces shown in the above condition (1). However, the present invention is not limited to the aspherical polynomials form shown in the condition (1).

Table 3 and Table 4 show design data of inflexion points and arrest points of respective lens in the camera optical lens 10 according to Embodiment 1 of the present invention. P1R1 and P1R2 represent the object side surface and the image side surface of the first lens L1, P2R1 and P2R2 represent the object side surface and the image side surface of the second lens L2, P3R1 and P3R2 represent the object side surface and the image side surface of the third lens L3, P4R1 and P4R2 represent the object side surface and the image side surface of the fourth lens L4, P5R1 and P5R2 represent the object side surface and the image side surface of the fifth lens L5, and P6R1 and P6R2 represent the object side surface and the image side surface of the sixth lens L6. The data in the column named “inflexion point position” refers to vertical distances from inflexion points arranged on each lens surface to the optical axis of the camera optical lens 10. The data in the column named “arrest point position” refers to vertical distances from arrest points arranged on each lens surface to the optical axis of the camera optical lens 10.

TABLE 3 Number of Inflexion Inflexion Inflexion inflexion point point point points position 1 position 2 position 3 P1R1 1 1.325 P1R2 1 0.645 P2R1 2 0.455 0.615 P2R2 0 P3R1 2 0.125 1.155 P3R2 2 0.285 1.295 P4R1 1 0.275 P4R2 3 0.285 1.095 1.555 P5R1 2 0.335 2.155 P5R2 3 1.125 1.985 2.525 P6R1 3 1.625 2.825 3.025 P6R2 3 0.615 2.825 3.135

TABLE 4 Number of Arrest point arrest points position 1 P1R1 0 P1R2 1 1.225 P2R1 0 P2R2 0 P3R1 1 0.215 P3R2 1 0.595 P4R1 1 0.565 P4R2 1 0.545 P5R1 1 0.745 P5R2 0 P6R1 0 P6R2 1 1.355

FIG. 2 and FIG. 3 respectively illustrate a longitudinal aberration and a lateral color of light with wavelengths of 435 nm, 486 nm, 546 nm, 587 nm, 656 nm after passing the camera optical lens 10 according to Embodiment 1. FIG. 4 illustrates a field curvature and a distortion of light with a wavelength of 546 nm after passing the camera optical lens 10 according to Embodiment 1, in which a field curvature S is a field curvature in a sagittal direction and T is a field curvature in a tangential direction.

Table 13 shows various values of Embodiments 1, 2 and 3 and values corresponding to parameters which are specified in the above conditions.

As shown in Table 13, Embodiment 1 satisfies the above conditions.

In this embodiment, the entrance pupil diameter of the camera optical lens is 2.689 mm. The image height of 1.0H is 4.000 mm. The FOV is 78.00°. Thus, the camera optical lens has a wide-angle and is ultra-thin. Its on-axis and off-axis chromatic aberrations are fully corrected, thereby achieving excellent optical characteristics.

Embodiment 2

Embodiment 2 is basically the same as Embodiment 1, the meaning of its symbols is the same as that of Embodiment 1, in the following, only the differences are listed.

Table 5 and table 6 show the design data of a camera optical lens 20 in Embodiment 2 of the present invention.

TABLE 5 R d nd vd S1 ∞ d0= −0.226 R1 2.317 dl= 0.508 ndl 1.5444 v1 55.82 R2 4.835 d2= 0.092 R3 2.883 d3= 0.495 nd2 1.6700 v2 19.39 R4 2.649 d4= 0.642 R5 7.018 d5= 0.333 nd3 1.6153 v3 25.94 R6 0.496 d6= 0.060 R7 0.389 d7= 0.300 nd4 1.6153 v4 25.94 R8 0.870 d8= 0.142 R9 32.975 d9= 0.795 nd5 1.5444 v5 55.82 R10 −1.536 d10= 1.056 R11 −18.445 d11= 0.350 nd6 1.5438 v6 56.03 R12 2.357 d12= 0.340 R13 ∞ d13= 0.210 ndg 1.5168 vg 64.17 R14 ∞ d14= 0.677

Table 6 shows aspherical surface data of each lens of the camera optical lens 20 in Embodiment 2 of the present invention.

TABLE 6 Conic coefficient Aspherical Surface coefficients k A4 A6 A8 A10 R1 −8.7951E−01 −2.6667E−03 1.0266E−02 −9.9329E−03 2.3225E−03 R2 −1.0000E+01 −1.9154E−01 2.2488E−01 −1.7209E−01 7.9554E−02 R3 −8.2351E+00 −1.5754E−01 1.5208E−01 −6.6332E−02 1.2585E−02 R4 1.8598E+00 −8.4317E−02 3.5985E−02 −6.8510E−03 0.0000E+00 R5 2.7215E+01 −2.8148E−01 8.7272E−01 −2.0402E+00 2.6521E+00 R6 −3.7217E+01 −2.9275E−01 2.5271E−01 3.4181E−01 −1.5659E+00 R7 −1.5910E+01 −3.8421E−01 1.5850E−01 8.9617E−02 −1.2576E−01 R8 −3.3684E+01 −3.3719E−01 3.7097E−01 −1.4359E−01 −2.7067E−02 R9 −7.6806E+00 −5.8775E−01 1.4045E+00 −1.5823E+00 1.0388E+00 R10 −3.1159E+00 −3.0167E−02 −6.8456E−03 1.1009E−01 −1.1265E−01 R11 9.2408E+00 −1.1200E−01 6.8019E−02 −2.5185E−02 6.2164E−03 R12 −6.1012E+00 −8.8397E−02 3.9613E−02 −1.1008E−02 1.7992E−03 Aspherical Surface coefficients A12 A14 A16 A18 A20 R1 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 R2 −1.6547E−02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 R3 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 R4 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 R5 −2.0458E+00 8.6081E−01 −1.4877E−01 0.0000E+00 0.0000E+00 R6 2.0386E+00 −1.3104E+00 4.2524E−01 −5.5157E−02 0.0000E+00 R7 6.9936E−02 −2.3286E−02 3.4877E−03 0.0000E+00 0.0000E+00 R8 4.9034E−02 −2.0087E−02 3.7177E−03 −2.6565E−04 0.0000E+00 R9 −4.2574E−01 1.1079E−01 −1.7840E−02 1.6242E−03 −6.4006E−05 R10 5.4283E−02 −1.4577E−02 2.2359E−03 −1.8348E−04 6.2556E−06 R11 −1.0419E−03 1.1822E−04 −8.7035E−06 3.7362E−07 −7.0617E−09 R12 −1.5367E−04 2.2075E−06 7.5748E−07 −6.1326E−08 1.5082E−09

Table 7 and table 8 show design data of inflexion points and arrest points of respective lens in the camera optical lens 20 according to Embodiment 2 of the present invention.

TABLE 7 Number of Inflexion Inflexion Inflexion Inflexion inflexion point point point point points position 1 position 2 position 3 position 4 P1R1 0 P1R2 1 0.355 P2R1 2 0.545 0.705 P2R2 0 P3R1 2 0.285 1.105 P3R2 2 0.195 1.205 P4R1 2 0.215 1.415 P4R2 4 0.235 0.835 1.325 1.775 P5R1 3 0.075 0.575 2.045 P5R2 2 0.875 2.105 P6R1 2 1.955 3.115 P6R2 1 0.635

TABLE 8 Number of Arrest point Arrest point Arrest point arrest points position 1 position 2 position 3 P1R1 0 P1R2 1 0.795 P2R1 0 P2R2 0 P3R1 1 0.585 P3R2 1 0.625 P4R1 1 0.605 P4R2 3 0.655 1.035 1.485 P5R1 2 0.115 0.915 P5R2 1 1.715 P6R1 0 0 P6R2 1 1.555

FIG. 6 and FIG. 7 respectively illustrate a longitudinal aberration and a lateral color of light with wavelengths of 435 nm, 486 nm, 546 nm, 587 nm, 656 nm after passing the camera optical lens 20 according to Embodiment 2. FIG. 8 illustrates a field curvature and a distortion of light with a wavelength of 546 nm after passing the camera optical lens 10 according to Embodiment 2, in which a field curvature S is a field curvature in a sagittal direction and T is a field curvature in a tangential direction.

As shown in Table 13, Embodiment 2 satisfies the various conditions.

In this embodiment, the entrance pupil diameter of the camera optical lens is 2.157 mm. The image height of 1.0H is 4.000 mm. The FOV is 78.00°. Thus, the camera optical lens has a wide-angle and is ultra-thin. Its on-axis and off-axis chromatic aberrations are fully corrected, thereby achieving excellent optical characteristics.

Embodiment 3

Embodiment 3 is basically the same as Embodiment 1 and involves symbols having the same meanings as Embodiment 1, and only differences therebetween will be described in the following.

Tables 9 and 10 show design data of a camera optical lens 30 in Embodiment 3 of the present invention.

TABLE 9 R d nd vd S1 ∞ d0= −0.216 R1 2.513 dl= 0.490 nd1 1.5444 v1 55.82 R2 5.298 d2= 0.076 R3 3.065 d3= 0.544 nd2 1.6700 v2 19.39 R4 2.665 d4= 0.547 R5 4.054 d5= 0.336 nd3 1.6153 v3 25.94 R6 0.955 d6= 0.060 R7 0.785 d7= 0.300 nd4 1.6153 v4 25.94 R8 1.352 d8= 0.152 R9 8.837 d9= 0.774 nd5 1.5444 v5 55.82 R10 −1.832 d10= 1.270 R11 −12.211 d11= 0.350 nd6 1.5438 v6 56.03 R12 2.633 d12= 0.340 R13 ∞ d13= 0.210 ndg 1.5168 vg 64.17 R14 ∞ d14= 0.551

Table 10 shows aspherical surface data of each lens of the camera optical lens 30 in Embodiment 3 of the present invention.

TABLE 10 Conic coefficient Aspherical Surface coefficients k A4 A6 A8 A10 R1 −5.4335E−01 −3.6280E−03 6.4705E−03 −2.5527E−03 1.9759E−03 R2 −7.1125E+00 −2.1658E−01 3.0776E−01 −2.6218E−01 1.3555E−01 R3 −8.7574E+00 −1.7930E−01 2.1502E−01 −1.2574E−01 2.8241E−02 R4 1.8276E+00 −8.9954E−02 4.2221E−02 −1.6930E−02 0.0000E+00 R5 8.4135E+00 −1.7615E−01 4.1339E−01 −1.1324E+00 1.6799E+00 R6 −4.5545E+01 −1.9394E−01 3.3786E−01 −4.4278E−01 7.1560E−02 R7 −2.4845E+01 −6.2696E−01 1.3070E+00 −1.6400E+00 1.2105E+00 R8 −2.7572E+01 −5.1763E−01 1.0835E+00 −1.1493E+00 7.3929E−01 R9 −2.5499E+01 −4.3160E−01 8.7050E−01 −8.9937E−01 5.7363E−01 R10 −3.6444E+00 −4.9211E−02 7.7473E−02 −7.9750E−02 6.3715E−02 R11 7.6567E+00 −7.1088E−02 1.7659E−02 −2.9309E−04 −8.6869E−04 R12 −3.3850E+00 −7.9530E−02 2.5107E−02 −5.1768E−03 6.2308E−04 Aspherical Surface coefficients A12 A14 A16 A18 A20 R1 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 R2 −3.1646E−02 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 R3 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 R4 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 R5 −1.4458E+00 6.5481E−01 −1.1840E−01 0.0000E+00 0.0000E+00 R6 3.3640E−01 −3.4820E−01 1.4347E−01 −2.1630E−02 0.0000E+00 R7 −5.1409E−01 1.1685E−01 −1.1038E−02 0.0000E+00 0.0000E+00 R8 −2.9878E−01 7.3895E−02 −1.0201E−02 6.0101E−04 0.0000E+00 R9 −2.3527E−01 6.2074E−02 −1.0183E−02 9.4609E−04 −3.8088E−05 R10 −2.8902E−02 7.4230E−03 −1.0812E−03 8.3329E−05 −2.6394E−06 R11 2.6410E−04 −4.0694E−05 3.5859E−06 −1.7119E−07 3.4384E−09 R12 −3.1883E−05 −1.8101E−06 3.7554E−07 −2.1155E−08 4.1853E−10

Table 11 and table 12 show Embodiment 3 design data of inflexion points and arrest points of respective lens in the camera optical lens 30 according to Embodiment 3 of the present invention.

TABLE 11 Number of Inflexion point Inflexion point Inflexion point inflexion points position 1 position 2 position 3 P1R1 0 P1R2 2 0.325 0.765 P2R1 3 0.555 0.655 0.885 P2R2 0 P3R1 2 0.505 1.105 P3R2 2 0.265 1.185 P4R1 2 0.225 1.165 P4R2 3 0.255 0.645 1.255 P5R1 2 0.165 0.625 P5R2 1 0.975 P6R1 1 1.775 P6R2 1 0.685

TABLE 12 Number of Arrest point Arrest point arrest points position 1 position 2 P1R1 0 P1R2 0 P2R1 0 P2R2 0 P3R1 1 0.805 P3R2 1 0.705 P4R1 1 0.605 P4R2 1 1.615 P5R1 2 0.285 0.895 P5R2 1 1.515 P6R1 0 P6R2 1 1.485

FIG. 10 and FIG. 11 respectively illustrate a longitudinal aberration and a lateral color of light with wavelengths of 435 nm, 486 nm, 546 nm, 587 nm, 656 nm after passing the camera optical lens 30 according to Embodiment 3. FIG. 12 illustrates a field curvature and a distortion of light with a wavelength of 546 nm after passing the camera optical lens 30 according to Embodiment 3, in which a field curvature S is a field curvature in a sagittal direction and T is a field curvature in a tangential direction.

Table 13 in the following lists values corresponding to the respective conditions in this embodiment in order to satisfy the above conditions.

In this embodiment, the entrance pupil diameter of the camera optical lens is 2.151 mm. The image height of 1.0H is 4.000 mm. The FOV is 78.20°. Thus, the camera optical lens has a wide-angle and is ultra-thin. Its on-axis and off-axis chromatic aberrations are fully corrected, thereby achieving excellent optical characteristics.

TABLE 13 Parameters and conditions Embodiment 1 Embodiment 2 Embodiment 3 f 4.840 4.854 4.840 f1 4.495 7.594 8.230 f2 −18.837 −324.694 −66.716 f3 −4.301 −0.876 −2.099 f4 6.120 0.914 2.507 f5 3.406 2.706 2.848 f6 −2.935 −3.804 −3.933 f12 5.415 7.204 8.495 FNO 1.80 2.25 2.25 f1/f3 −1.05 −8.67 −3.92 R5/R6 19.83 14.15 4.25

It is to be understood, however, that even though numerous characteristics and advantages of the present exemplary embodiments have been set forth in the foregoing description, together with details of the structures and functions of the embodiments, the disclosure is illustrative only, and changes may be made in detail, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms where the appended claims are expressed. 

What is claimed is:
 1. A camera optical lens, comprising, from an object side to an image side in sequence: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens; the first lens has a positive refractive power, the second lens has a negative refractive power, the third lens has a negative refractive power, the fourth lens has a positive refractive power, the fifth lens has a positive refractive power, and the sixth lens has a negative refractive power; wherein the camera optical lens satisfies the following conditions: 0.56

f12/f

2.63; −10.00

f1/f3

−1.00; and 3.50

R5/R6

20.00; where, f: a focal length of the camera optical lens; f12:a combined focal length of the first lens and the second lens; f3: a focal length of the third lens; f1: a focal length of the first lens; R5: a curvature radius of an object side surface of the third lens; and R6: a curvature radius of an image side surface of the third lens.
 2. The camera optical lens according to claim 1 further satisfying the following conditions: −9.33

f1/f3

−1.02; and 3.87

R5/R6

19.92.
 3. The camera optical lens according to claim 1, wherein the first lens has a convex object side surface in a paraxial region and a concave image side surface in the paraxial region; the camera optical lens further satisfies the following conditions: 0.46

f1/f

2.55; −5.68

(R1+R2)/(R1−R2)

−1.25; and 0.04

d1/TTL

0.22; where, R1: a curvature radius of the object side surface of the first lens; R2: a curvature radius of the image side surface of the first lens; d1: an on-axis thickness of the first lens; and TTL: a total optical length from the object side surface of the first lens of the camera optical lens to an image surface of the camera optical lens along an optical axis.
 4. The camera optical lens according to claim 3 further satisfying the following conditions: 0.74

f1/f

2.04; −3.55

(R1+R2)/(R1−R2)

−1.57; and 0.07

d1/TTL

0.18.
 5. The camera optical lens according to claim 1, wherein, the second lens has a convex object side surface in a paraxial region and a concave image side surface in the paraxial region; the camera optical lens satisfies the following conditions: −133.78

f2/f

−2.59; 2.37

(R3+R4)/(R3−R4)

35.46; and 0.02

d3/TTL

0.14; where, R3: a curvature radius of the object side surface of the second lens; R4: a curvature radius of the image side surface of the second lens; f2: a focal length of the second lens; d3: an on-axis thickness of the second lens; and TTL: a total optical length from an object side surface of the first lens of the camera optical lens to an image surface of the camera optical lens along an optical axis.
 6. The camera optical lens according to claim 5 further satisfying the following conditions: −83.62

f2/f

−3.24; 3.79

(R3+R4)/(R3−R4)

28.37; and 0.04

d3/TTL

0.11.
 7. The camera optical lens according to claim 1, wherein the object side surface of the third lens being convex in a paraxial region and the image side surface of the third lens being concave in the paraxial region; and the camera optical lens satisfies the following conditions: −1.78

f3/f

−0.12; 0.55

(R5+R6)/(R5−R6)

2.42; and 0.03

d5/TTL

0.10; where, d5: an on-axis thickness of the third lens; and TTL: a total optical length from an object side surface of the first lens of the camera optical lens to an image surface of the camera optical lens along an optical axis.
 8. The camera optical lens according to claim 7 further satisfying the following conditions: −1.11

f3/f

−0.15; 0.88

(R5+R6)/(R5−R6)

1.94; and 0.04

d5/TTL

0.08.
 9. The camera optical lens according to claim 1, wherein the fourth lens has a convex object side surface in a paraxial region and a concave image side surface in the paraxial region; the camera optical lens further satisfies the following conditions: 0.09

f4/f

1.90; −7.54

(R7+R8)/(R7−R8)

−1.74; and 0.03

d7/TTL

0.08; where, R7: a curvature radius of the image side surface of the fourth lens; R8: a curvature radius of the object side surface of the fourth lens; f4: a focal length of the fourth lens; d7: an on-axis thickness of the fourth lens; and TTL: a total optical length from an object side surface of the first lens of the camera optical lens to an image surface of the camera optical lens along an optical axis.
 10. The camera optical lens according to claim 9 further satisfying the following conditions: 0.15

f4/f

1.52; −4.71

(R7+R8)/(R7−R8)

−2.18; and 0.04

d7/TTL

0.06.
 11. The camera optical lens according to claim 1, wherein the fifth lens has a convex object side surface in a paraxial region and a convex image side surface in the paraxial region; the camera optical lens further satisfies the following conditions: 0.28

f5/f

1.06; 0.33

(R9+R10)/(R9−R10)

1.37; and 0.06

d9/TTL

0.25; where, f5: a focal length of the fifth lens; R9: a curvature radius of the object side surface of the fifth lens; R10: a curvature radius of the image side surface of the fifth lens; d9: an on-axis thickness of the fifth lens; and TTL: a total optical length from an object side surface of the first lens of the camera optical lens to an image surface of the camera optical lens along an optical axis.
 12. The camera optical lens according to claim 11 further satisfying the following conditions: 0.45

f5/f

0.84; 0.53

(R9+R10)/(R9−R10)

1.09; and 0.10

d9/TTL

0.20.
 13. The camera optical lens according to claim 1, wherein the sixth lens has a negative refractive power with a concave object side surface in a paraxial region and a concave image side surface in the paraxial region; the camera optical lens further satisfies the following conditions: −1.63

f6/f

−0.40; 0.26

(R11+R12)/(R11−R12)

1.16; and 0.03

d11/TTL

0.10; where, f6: a focal length of the sixth lens; R11: a curvature radius of the object side surface of the sixth lens; R12: a curvature radius of the image side surface of the sixth lens; d11: an on-axis thickness of the sixth lens; and TTL: a total optical length from an object side surface of the first lens of the camera optical lens to an image surface of the camera optical lens along an optical axis.
 14. The camera optical lens according to claim 13 further satisfying the following conditions: −1.02

f6/f

−0.51; 0.42

(R11+R12)/(R11−R12)

0.93; and 0.05

d11/TTL

0.08.
 15. The camera optical lens according to claim 1 further satisfying the following conditions: 0.90

f12/f

2.11.
 16. The camera optical lens as described in claim 1, wherein a total optical length from an object side surface of the first lens of the camera optical lens to an image surface of the camera optical lens along an optical axis is less than or equal to 6.60 millimeters.
 17. The camera optical lens as described in claim 16, wherein the total optical length from the object side surface of the first lens of the camera optical lens to the image surface of the camera optical lens along the optical axis is less than or equal to 6.30 millimeters.
 18. The camera optical lens as described in claim 1, wherein an F number of the camera optical lens is less than or equal to 2.32.
 19. The camera optical lens as described in claim 18, wherein the F number of the camera optical lens is less than or equal to 2.27. 